5results about How to "Increase conversion rate per pass" patented technology

The invention belongs to the field of organic matter synthesis, and particularly discloses a preparation method of tert-dodecyl mercaptan, which is characterized in that hydrogen sulfide and dodecene are used as raw materials, and an addition reaction is performed under the catalytic action of a solid acid catalyst by adopting a liquid-solid heterogeneous process and a fixed bed reactor to obtain the tert-dodecyl mercaptan. The continuous liquid-solid reaction is realized, the diffusion time of hydrogen sulfide to a liquid phase main body is shortened, the heat capacity and the heat transfer coefficient of a reaction system are improved, the catalytic efficiency of the catalyst and the temperature controllability of the reaction process are improved, and the reactor design is simplified. Under proper operation conditions, the conversion per pass of dodecene is greater than or equal to 85%, the selectivity is close to 100%, the technological process is simple, few three wastes are generated, treatment is easy, and the method is suitable for industrial production.

The application discloses a high-temperature plasma cooperates with a converter to recover high-temperature flue gas heat-chemical waste heat, and belongs to the technical field of metallurgical process waste heat recovery and coal gas resource utilization. The method sprays carbonaceous powder into the primary flue gas of the converter at 1400-1600 DEG C, and converts the physical sensible heat of the flue gas into chemical energy of the coal gas by using the Boudou gasification reaction; the power-adjustable plasma heating device is arranged along the reaction zone, the high-grade electric heat is actively compensated for the reaction endothermic temperature drop, the temperature of the reaction zone is maintained above 1200 DEG C, the conversion rate is improved to 85-95% through the closed-loop regulation and control of the temperature and the CO2 conversion rate. The system comprises a carbon powder spraying device, a plasma heat-supplying reaction section, a detection unit and an intelligent regulation and control unit. The application uses the electric consumption of about 10-16 kWh / t of steel to pry the chemical energy recovery of 84-129 MJ / t of steel, the energy amplification ratio reaches 2-3.5 times, and the application has the advantages of accurate temperature control, second-level response, cleanness, high efficiency, low valley electric energy storage upgrading and the like.

The invention discloses a method for preparing 1-chloro-1,1-difluoroethane by gas phase catalysis, wherein the method uses 1,1-difluoroethane and chlorine as raw materials, and prepares the 1-chloro-1,1-difluoroethane by gas phase chlorination reaction under the action of a chlorination catalyst, wherein the chlorination catalyst is selected from a Lewis acid catalyst. The invention has the advantages of high single-pass conversion rate, high product selectivity, low production cost, continuous reaction, and suitability for industrial application.

This invention discloses a separation process for cold hydrogenation synthesis gas. The synthesis gas exiting the cold hydrogenation reactor undergoes heat recovery and rapid cooling for dust removal. A portion of the condensed chlorosilanes is further cooled by a chlorosilane water cooler and used as the absorbent in the middle of the absorption tower. The circulating mixed gas is cooled by a circulating mixed gas water cooler and then enters the lower part of the absorption tower. Silicon tetrachloride feedstock is then used as the absorbent in the upper part of the absorption tower, while the middle absorbent is cooled chlorosilane. The circulating mixed gas entering from the lower part of the absorption tower achieves separation of the cold hydrogenation product chlorosilane through the middle absorbent chlorosilane and the upper absorbent silicon tetrachloride feedstock. Only circulating water coolant is needed; low-temperature coolants (7°C coolant, -40°C coolant, etc.) are not required for multi-stage condensation of the circulating mixed gas to achieve the separation of the cold hydrogenation product chlorosilane, thus eliminating the need for a dedicated low-temperature coolant system for the cold hydrogenation unit.

This invention discloses a highly efficient composite solubilizer for the hydration of butene to sec-butanol, belonging to the field of chemical process technology. Its composition includes: 0-60 parts of a polyether-based polymeric surfactant, 15-35 parts of a highly polar aprotic solvent, and 10-20 parts of a co-catalyst. The main solubilizing component of this invention disperses oily butene into extremely small droplets, allowing it to mix uniformly in water, thereby increasing the surface area for the reaction. The co-solvent, as the main component, provides a stable environment, ensuring that this highly mixed state is maintained for a certain period. The added additives, possessing both water and oil solubility, facilitate smoother dissolution of the mixture and help the reactants quickly contact the active sites of the catalyst. This accelerates the reaction rate of butene and water, significantly improving the efficiency of the one-time conversion to sec-butanol and greatly saving the large amount of energy required for material recycling.